First I would like to know when the support law changed in Indiana from 18 to 21? Also how do you file to modify items when you live out of state? I really don't want to have to retain an attorney if at all possible. I am trying to keep things cordial between my ex and myself. If they go away to school does the support stop and then you help with college expenses? Where can I find the actual case law on this? Thanks for your help.

The only way to really answer your questions is to speak with an attorney from the state where the support order originated, as that is the state of jurisdiction. You might not necessarily have to retain one but you'll need to pay for an initial consultation to have all of your concerns addressed.